317LMN stainless steel plate – UNS S31726

317LMN stainless steel is a high molybdenum, austenitic stainless steel with a higher nickel content than 317L and the addition of nitrogen.  Nitrogen provides additional strength to this grade, and like the regular variations, it can only be cold worked to harden. 

Our 317LMN steel plate is perfect for sulfur rich environments, where its high molybdenum content improves corrosion resistance.  The addition of nitrogen also improves its strength and ability to resist corrosion at grain boundaries when welded.  Ask about our full service shearing and cutting services for this grade!

317LMN is frequently used in power plant environments for flue gasses, paper pulp, acidic dyes in textiles, and other chemical processing applications. 

317LMN Inventory Size Ranges


0.625" - 1.250"

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Standard Inventory Specifications

  • UNS S31726 - 317LMN
  • ASTM A 240
  • ASTM A182
  • ASTM A167
  • ASME SA 240

Common Applications of 317LMN

  • Pulp and paper processing
  • Food processing equipment
  • Textiles and acidic dyes
  • Condensers for nuclear and fossil fuel power plants

Chemical Composition

317LMN Stainless Steel Composition
Element Percent by Weight
C Carbon 3.00
Mn Manganese 200
Si Silicon 75.00
Cr Chromium 17.00 - 20.00
Ni Nickel 13.70 - 17.50
Mo Molybdenum 4.00 - 5.00
P Phosphorous 4.50
S Sulfur 0.03
N Nitrogen 0.1 - 0.2
Fe Iron Balance
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Physical Properties of 317LMN Stainless Steel



Density lb/in3


Thermal Conductivity, Btu/ft hr°F


Electrical Resistivity, Ω-inch

33.5 x 10- 6

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Mechanical Properties of 317LMN Stainless Steel




Ultimate Tensile Strength, ksi


75 min

0.2% Offset Yield Strength, ksi


30 min

Elongation in 2 inches, %


40 min

Hardness, Rockwell B


95 max

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*The technical data provided is for information only and not for design purposes. It is not warranted or guaranteed.